Apparatus

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sensors Mode-S transponder

781F73

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32ED · AIRBUS A-350-900

Hex
781F73
Octal
36017563
Decimal
7,872,371
Country
CN
Tail
B-32ED
Type
A359
No current signal · last broadcast 5h ago
Flights observed
89
Distinct callsigns
14
Country
CN
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 781F73.

Country allocation

The ICAO 24-bit address 781F73 falls within the block assigned to China (CN) by ICAO Annex 10, Volume III. Every aircraft registered in China receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 14 distinct

Callsign Airline Flights Last seen
CSN346 China Southern Airlines 16 2026-05-24
CSN345 China Southern Airlines 14 2026-05-23
CSN674 China Southern Airlines 10 2026-05-20
CSN322 China Southern Airlines 8 2026-05-27
CSN302 China Southern Airlines 8 2026-05-29
CSN673 China Southern Airlines 6 2026-05-19
CSN306 China Southern Airlines 6 2026-05-14
CSN349 China Southern Airlines 5 2026-05-30
CSN321 China Southern Airlines 4 2026-05-26
CSN301 China Southern Airlines 4 2026-05-29
CSN350 China Southern Airlines 3 2026-05-15
CSN305 China Southern Airlines 3 2026-05-13
CSN3194 China Southern Airlines 1 2026-04-16
CSN3193 China Southern Airlines 1 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CSN349 CAN → KUL May 30, 03:45 UTCMay 30, 04:20 UTC35m
2026-05-30 CSN349 CAN → KUL May 30, 01:05 UTCMay 30, 01:15 UTC10m
2026-05-29 CSN302 SYD → CAN May 29, 20:10 UTCMay 29, 20:45 UTC35m
2026-05-29 CSN302 SYD → CAN May 29, 11:45 UTCMay 29, 19:25 UTC7h 40m
2026-05-29 CSN301 CAN → SYD May 29, 00:40 UTCMay 29, 09:10 UTC8h 30m
2026-05-28 CSN302 SYD → CAN May 28, 20:05 UTCMay 28, 20:40 UTC35m
2026-05-28 CSN302 SYD → CAN May 28, 11:55 UTCMay 28, 19:20 UTC7h 25m
2026-05-28 CSN301 CAN → SYD May 28, 00:40 UTCMay 28, 09:20 UTC8h 40m
2026-05-27 CSN322 MEL → CAN May 27, 08:35 UTCMay 27, 08:50 UTC15m
2026-05-27 CSN322 MEL → CAN May 27, 00:39 UTCMay 27, 07:45 UTC7h 5m
2026-05-26 CSN321 CAN → MEL May 26, 13:45 UTCMay 26, 22:29 UTC8h 45m
2026-05-24 CSN346 AMS → PKX May 24, 21:05 UTCMay 25, 02:55 UTC5h 50m
2026-05-23 CSN345 PEK → AMS May 23, 20:50 UTCMay 24, 16:25 UTC19h 35m
2026-05-23 CSN345 PEK → AMS May 23, 20:05 UTCMay 24, 16:25 UTC20h 20m
2026-05-23 CSN345 PEK → AMS May 23, 09:40 UTCMay 23, 16:15 UTC6h 35m
2026-05-22 CSN346 AMS → PKX May 22, 04:25 UTCMay 22, 04:40 UTC15m
2026-05-21 CSN346 AMS → PKX May 21, 20:00 UTCMay 22, 01:55 UTC5h 55m
2026-05-21 CSN345 PEK → AMS May 21, 06:40 UTCMay 21, 16:05 UTC9h 25m
2026-05-20 CSN674 LHR → PKX May 20, 05:20 UTCMay 20, 05:30 UTC10m
2026-05-19 CSN674 LHR → PKX May 19, 20:30 UTCMay 20, 02:45 UTC6h 15m
2026-05-19 CSN673 PKX → LHR May 19, 06:35 UTCMay 19, 16:55 UTC10h 20m
2026-05-17 CSN322 MEL → CAN May 17, 09:20 UTCMay 17, 09:35 UTC15m
2026-05-17 CSN322 MEL → CAN May 17, 00:40 UTCMay 17, 08:25 UTC7h 45m
2026-05-16 CSN321 CAN → MEL May 16, 13:51 UTCMay 16, 22:10 UTC8h 20m
2026-05-15 CSN350 KUL → CAN May 15, 07:15 UTCMay 15, 07:30 UTC15m
2026-05-15 CSN349 CAN → KUL May 15, 03:35 UTCMay 15, 04:15 UTC40m
2026-05-15 CSN349 CAN → KUL May 15, 01:05 UTCMay 15, 01:15 UTC10m
2026-05-14 CSN306 AKL → CAN May 14, 20:25 UTCMay 14, 20:45 UTC20m
2026-05-14 CSN306 AKL → CAN May 14, 09:35 UTCMay 14, 19:35 UTC10h 0m
2026-05-13 CSN305 CAN → AKL May 13, 17:10 UTCMay 14, 03:05 UTC9h 55m
2026-05-13 CSN350 KUL → CAN May 13, 06:15 UTCMay 13, 06:25 UTC10m
2026-05-13 CSN349 CAN → KUL May 13, 03:40 UTCMay 13, 04:15 UTC35m
2026-05-12 CSN302 SYD → CAN May 12, 20:20 UTCMay 12, 20:35 UTC15m
2026-05-12 CSN302 SYD → CAN May 12, 11:50 UTCMay 12, 19:25 UTC7h 35m
2026-05-12 CSN301 CAN → SYD May 12, 08:10 UTCMay 12, 09:05 UTC55m
2026-05-11 CSN302 SYD → CAN May 11, 21:00 UTCMay 11, 21:20 UTC20m
2026-05-11 CSN302 SYD → CAN May 11, 12:25 UTCMay 11, 20:10 UTC7h 45m
2026-05-11 CSN301 CAN → SYD May 11, 00:45 UTCMay 11, 08:55 UTC8h 10m
2026-05-09 CSN346 AMS → PKX May 9, 20:15 UTCMay 10, 02:10 UTC5h 55m
2026-05-09 CSN345 PEK → AMS May 9, 06:40 UTCMay 9, 16:30 UTC9h 50m
2026-05-08 CSN346 AMS → PKX May 8, 04:09 UTCMay 8, 04:25 UTC15m
2026-05-07 CSN346 AMS → PKX May 7, 20:00 UTCMay 8, 01:40 UTC5h 39m
2026-05-07 CSN345 PEK → AMS May 7, 06:50 UTCMay 7, 17:00 UTC10h 11m
2026-05-06 CSN674 LHR → PKX May 6, 05:00 UTCMay 6, 05:15 UTC15m
2026-05-05 CSN674 LHR → PKX May 5, 20:30 UTCMay 6, 02:35 UTC6h 5m
2026-05-05 CSN673 PKX → LHR May 5, 08:35 UTCMay 5, 17:15 UTC8h 40m
2026-05-05 CSN673 PKX → LHR May 5, 06:40 UTCMay 5, 06:50 UTC10m
2026-05-03 CSN346 AMS → PKX May 3, 04:20 UTCMay 3, 04:30 UTC10m
2026-05-02 CSN346 AMS → PKX May 2, 20:10 UTCMay 3, 01:55 UTC5h 45m
2026-05-02 CSN345 PEK → AMS May 2, 06:45 UTCMay 2, 16:25 UTC9h 40m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the B-32ED page for operator, model, and routing details .

Mode-S 781F73 frequently asked

What is Mode-S code 781F73?
781F73 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32ED.
Where is Mode-S 781F73 registered?
Mode-S code 781F73 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781F73 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781F73, octal 36017563, decimal 7,872,371.
What flights does 781F73 operate?
Mode-S 781F73 has broadcast 14 distinct callsigns, including CSN346, CSN345, CSN674, CSN322, CSN302.